LED Fixtures Hitting Shelfs - Home Energy Pros2015-03-31T22:45:03Zhttp://homeenergypros.lbl.gov/forum/topics/led-fixtures-hitting-shelfs?commentId=6069565%3AComment%3A134086&xg_source=activity&feed=yes&xn_auth=noGenerally based upon the need…tag:homeenergypros.lbl.gov,2014-08-04:6069565:Comment:1630762014-08-04T09:59:56.799Zreflintormhttp://homeenergypros.lbl.gov/profile/reflintorm
<p>Generally based upon the needed requirements, The mode of selection will be depended. In these aspects, We must consider the high quality of LED strips which will help us to give more brightness while compared to the normal one.</p>
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<p><a href="http://reflector-design.com/index.php/component/hikashop/product/1-shape-4-basic-edition?Itemid=184" target="_blank">reflector design</a></p>
<p>Generally based upon the needed requirements, The mode of selection will be depended. In these aspects, We must consider the high quality of LED strips which will help us to give more brightness while compared to the normal one.</p>
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<p><a href="http://reflector-design.com/index.php/component/hikashop/product/1-shape-4-basic-edition?Itemid=184" target="_blank">reflector design</a></p> At $30 I expect it to last, h…tag:homeenergypros.lbl.gov,2013-08-17:6069565:Comment:1343502013-08-17T12:48:33.085ZBob Blanchettehttp://homeenergypros.lbl.gov/profile/BobBlanchette
<p>At $30 I expect it to last, hopefully they stand behind their warranty for 5yrs if it doesn't. If it fails after 5yrs LED tech will be fully mature by then and newer better fixtures will be out. Fixtures designed for LED from the start have a lumen/watt advantage since they can take advantage of the native directional properties of LED. Fixtures also have more thermal management options compared to A19 retrofit laps, and as you said heat is the enemy of the electronics/driver…</p>
<p>At $30 I expect it to last, hopefully they stand behind their warranty for 5yrs if it doesn't. If it fails after 5yrs LED tech will be fully mature by then and newer better fixtures will be out. Fixtures designed for LED from the start have a lumen/watt advantage since they can take advantage of the native directional properties of LED. Fixtures also have more thermal management options compared to A19 retrofit laps, and as you said heat is the enemy of the electronics/driver circuit.</p>
<p>IMHO the best is yet to come for LED fixtures, I'm sure they are working on things we haven't even though of. Fixtures is what will revolutionize the LED lighting industry, not A19 replacements...</p>
<p></p> There are 50 point LED's (pos…tag:homeenergypros.lbl.gov,2013-08-17:6069565:Comment:1344012013-08-17T05:18:22.130ZDennis Heidnerhttp://homeenergypros.lbl.gov/profile/DennisHeidner
<p>There are 50 point LED's (possibly cree's devices) on the board. The large black chip is most likely the a chip whose function is sensing dimming on the incoming power signal and translating that to the equivalent on/off duty cycle for the LED's. Just a couple of small surface mount chip caps.. so no electrolytics to fail. But heat is a silent killer for most IC's... if the fixture is hot - U1 is gets my second vote for the most failures. First goes to the movistor. The LED's are likely…</p>
<p>There are 50 point LED's (possibly cree's devices) on the board. The large black chip is most likely the a chip whose function is sensing dimming on the incoming power signal and translating that to the equivalent on/off duty cycle for the LED's. Just a couple of small surface mount chip caps.. so no electrolytics to fail. But heat is a silent killer for most IC's... if the fixture is hot - U1 is gets my second vote for the most failures. First goes to the movistor. The LED's are likely to suffer a "fading" effect and slowly become less effective. Four or five years from now you might notice a difference if you compare it against an identical fixture. But then anyone expect a CFL last five years - with lots of use, dimming, and turning on/off....</p> I too had the offset issue, t…tag:homeenergypros.lbl.gov,2013-08-17:6069565:Comment:1340972013-08-17T03:07:17.735ZBob Blanchettehttp://homeenergypros.lbl.gov/profile/BobBlanchette
<p>I too had the offset issue, the 2nd screw went direct into the ceiling joist. Oddly the smaller boxes seem more common than the larger ones in ceiling use.</p>
<p>I too had the offset issue, the 2nd screw went direct into the ceiling joist. Oddly the smaller boxes seem more common than the larger ones in ceiling use.</p> I put one in today love the l…tag:homeenergypros.lbl.gov,2013-08-17:6069565:Comment:1340932013-08-17T02:53:23.496ZEric Kjelshushttp://homeenergypros.lbl.gov/profile/EricKjelshus
<p>I put one in today love the light but it just fits a small box not full size, so I had to off set to make it work with only one holder. this light does get hot</p>
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<p>I put one in today love the light but it just fits a small box not full size, so I had to off set to make it work with only one holder. this light does get hot</p>
<p></p> Correct, but if it fails - a…tag:homeenergypros.lbl.gov,2013-08-17:6069565:Comment:1340912013-08-17T02:18:03.743ZDennis Heidnerhttp://homeenergypros.lbl.gov/profile/DennisHeidner
<p>Correct, but if it fails - and someone gets a ladder out to check on the light. Guess what the result might be when the touch the hot fixture and do not suspect it while on the ladder? Most of the fixture is plastic - so it shouldn't be a problem - and you are likely to see the damage when you pull the diffuser off. </p>
<p>Correct, but if it fails - and someone gets a ladder out to check on the light. Guess what the result might be when the touch the hot fixture and do not suspect it while on the ladder? Most of the fixture is plastic - so it shouldn't be a problem - and you are likely to see the damage when you pull the diffuser off. </p> So the danger of shock is lim…tag:homeenergypros.lbl.gov,2013-08-17:6069565:Comment:1342682013-08-17T00:32:40.272ZBob Blanchettehttp://homeenergypros.lbl.gov/profile/BobBlanchette
<p>So the danger of shock is limited to the light itself and possibly the box in the event of a short?</p>
<p>So the danger of shock is limited to the light itself and possibly the box in the event of a short?</p> The hot wire is running right…tag:homeenergypros.lbl.gov,2013-08-17:6069565:Comment:1342672013-08-17T00:28:34.323ZDennis Heidnerhttp://homeenergypros.lbl.gov/profile/DennisHeidner
<p>The hot wire is running right over the active LED components, the movistor is right below were the molex connector for the incoming power. Movistors when they fail -- graciously give up their bodies for the good of man... its hard to say what will happen to the connector. If there is now a path from the hot - on the connector -- and the fuse on the board is long after the connector. Or if the hot wire decides to melt and insulation fails because of heat and proximity to the LED --- then…</p>
<p>The hot wire is running right over the active LED components, the movistor is right below were the molex connector for the incoming power. Movistors when they fail -- graciously give up their bodies for the good of man... its hard to say what will happen to the connector. If there is now a path from the hot - on the connector -- and the fuse on the board is long after the connector. Or if the hot wire decides to melt and insulation fails because of heat and proximity to the LED --- then without a ground on the electrical box for the fixture.. the heat sink portion of the light may be live.</p>
<p>If the house doesn't have a box - and the light is just mounted to the sheetrock then it is isolated -- but it isn't code either. Old houses often are not new code complaint. Houses built in 50's and early 60's may lack a ground to the light.</p> But in many houses (older) th…tag:homeenergypros.lbl.gov,2013-08-16:6069565:Comment:1340862013-08-16T22:34:04.133ZBob Blanchettehttp://homeenergypros.lbl.gov/profile/BobBlanchette
<blockquote><p>But in many houses (older) the lights may not have a ground. In which a failure would result in a hot receptacle.</p>
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<p>I don't quite understand this one. If the house has ungrounded wiring how does a short in the light cause a hot receptacle? A hot casing to the light fixture makes sense, but a receptacle at a different location?</p>
<blockquote><p>But in many houses (older) the lights may not have a ground. In which a failure would result in a hot receptacle.</p>
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<p>I don't quite understand this one. If the house has ungrounded wiring how does a short in the light cause a hot receptacle? A hot casing to the light fixture makes sense, but a receptacle at a different location?</p> Yes, they will fail open - it…tag:homeenergypros.lbl.gov,2013-08-16:6069565:Comment:1341602013-08-16T20:42:48.740ZDennis Heidnerhttp://homeenergypros.lbl.gov/profile/DennisHeidner
<p>Yes, they will fail open - its the process in between that you have to worry about. Because the hot wire over lays active components and is in the area of the movistor - the hot could be compromised -- and the fuses then have no value -- they are after the connector. The heat sink is grounded. So as long as the light socket has a ground available - the worst case is that a failed light will trigger breaker (x fingers crossed). But in many houses (older) the lights may not have a ground.…</p>
<p>Yes, they will fail open - its the process in between that you have to worry about. Because the hot wire over lays active components and is in the area of the movistor - the hot could be compromised -- and the fuses then have no value -- they are after the connector. The heat sink is grounded. So as long as the light socket has a ground available - the worst case is that a failed light will trigger breaker (x fingers crossed). But in many houses (older) the lights may not have a ground. In which a failure would result in a hot receptacle. </p>
<p>Companies that design and sell electrical lighting products are supposed to look for these... they missed the obvious wire over light. That then begs the question of what else did they miss.</p>
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<p>I have a Pharox digital light in front of me as a reminder of the changes in the LED industry. It's warranty was three years. I had one fail after one year and tried to get an exchange. I was able to contact the company - but in the end gave up because they were evasive. I had all the receipts AND containers!!!</p>
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<p>I have a simple exercise tool (big rubber band for stretching) that claims to have a 1 year warranty. The process is simple - send the failed item, proof of purchase, original packaging and $7.50 to cover shipping and handling to the manufacturer on the east coast. (I live on west coast). They will replace it. Problem being -- I only paid $6.49 plus taxes at the local store...</p>
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<p>In general unless an items fails within a few weeks and I can return to store and argue with them - I now see most warranties as not useable. The one wonderful exception that I have seen was Lowepro camera bag. The replaced a defective unit - only asking for serial number - they shipped new unit AND did not want the old one returned. I've since bought THREE more of their high end camera bags from them. I like their customer service.</p>
<p>What might be really interesting in the case of this light fixture is a letter to the company asking about it... see what their response might be...</p>
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